Demonstrators arrive at the Nigerian consulate after marching from Harlem on Saturday in New York. They were pressing for the rescue of 276 schoolgirls still held captive by Islamic extremists in Nigeria.

LAGOS, Nigeria — The president of Nigeria for weeks refused international help to search for more than 300 girls abducted from a school by Islamic extremists, one in a series of missteps that have led to growing international outrage against the government.

The United Kingdom, Nigeria’s former colonizer, first said it was ready to help in a news release the day after the mass abduction April 15, and made a formal offer of assistance on April 18, according to the British Foreign Office.

The U.S. has said its embassy and staff agencies offered help and were in touch with Nigeria “from Day One” of the crisis, according to Secretary of State John Kerry.

Yet it was only last week, almost a month later, that President Goodluck Jonathan accepted help from the U.S., Britain, France and China.

The delay underlines what has been a major problem in the attempt to find the girls: an apparent lack of urgency on the part of the government and military, for reasons that include a reluctance to bring in outsiders as well as possible infiltration by the extremists.

Jonathan bristled last week when he said President Barack Obama, in a telephone conversation about aid, had brought up alleged human rights abuses by Nigerian security forces. Jonathan also acknowledged that his government might be penetrated by insurgents from Boko Haram, the extremist group that kidnapped the girls.

Last year, he said he suspected Boko Haram terrorists might be in the executive, legislative and judiciary arms of government along with the police and armed forces.

The waiting has left parents in agony, especially because they fear some of their daughters have been forced into marriage with their abductors for a nominal bride price of $12. Boko Haram leader Abubakar Shekau called the girls slaves in a video last week and vowed to sell them.

The military has denied that it ignored warnings of the impending attacks. Maj. Gen. Chris Olukolade, a Defense Ministry spokesman, told The Associated Press that the major challenge has been that some of the information given turned out to be misleading.

Reuben Abati, one of Jonathan’s presidential advisers, denied that Nigeria had turned down offers of help.

“That information cannot be correct,” he said. “What John Kerry said is that this is the first time Nigeria is seeking assistance on the issue of the abducted girls.”

In fact, Kerry has said Nigeria did not welcome U.S. help earlier because it wanted to pursue its own strategy. U.S. Sen. Chris Coons said Friday that it took “far too long” for Jonathan to accept U.S. offers of aid, and he is holding a hearing this week to examine what happened.

A senior State Department official also said Friday that the U.S. offered help “back in April, more or less right away.”

“We didn’t go public about it because the consensus was that doing so would make the Nigerians less likely to accept our help,” said the official on condition of anonymity.

Nigeria receives hundreds of thousands of dollars in aid from the U.S. every year to address a rising insurgency in the north and growing tensions between Christians and Muslims.

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